1810 An important letter has been stolen from the hiding place of Empress Maria Feodorovna. It must not fall into the hands of Napoleon. Fortunately, the name of the robber is known, and the empress’s close lady Natalya Struyskaya and the fearless guards officer Pavel Kovrov set off in pursuit of him. The characters should pretend to be lovers. Meanwhile, they have little sympathy for each other and trust each other: the reason for this is the ugly story of five years ago. The difficult relationships of the heroes endanger not only the fulfillment of a responsible mission, but also their own lives.